Improvement in furnace-grates



UNITED STATES IEATENT foEEioE.

HARVEY H. BURRITT AND GEORGEA. OHL, 0E NEWARK, NEw JERSEY.

VIMPROVEM Al-:NT IN F.URNACEfGRATEs.

Specification forming part of Letters Patent N0. 19,967, datedV January8, 1878; applica-tionV filed August 24, 1877.

To all whom t/may concern:

Beit known that we, HARVEY H. BURRITT and GEO.` A. OHL, of the city ofNewark, Es`

sex county, New Jersey, have invented certain Improvements in Grates forBurning Goal; and we do hereby declare that the following is a full,clear, and exact description of the same, reference being'had to theaccompanying drawings, in which- Figure lis a plan fa'diunping-grateconstructed according to our plan 5' Fig. 2, a sec,-tional side view of the same; and Figs. 8 and 4, respectively, are aplan and end View of a stationary furnacelgrate tted with rockinggrates, as described herein.

Our improvements consist in a peculiar mode 0f constructing rockinggrates, and in operating the same, both in a stationary furnacegrate andin a dumping-grate.

In Fig. 1 we have shown a dumping-grate constructed with a frame, A A,into which are fitted a number of rocking grates, B B. The frame isfitted with pivots C C', upon which it can be rotated in the furnace,and its contents discharged when desired.

In Fig. 2, at B B, are shown two of the rocking grates in section, bywhich it will be seen that they consist of side bars D D, connected atthe ends by trunnion-plates E, and carrying a series of arched ribs, Gr,which sustain the coal. The side bars D are also furnished with spurs F,projecting toward the adjoining grates, and serving to break and grindthe clinkers lodged between the grates when the same are simultaneouslyrocked. The trunnions are marked a.

The rocking mechanism may consist of a bar, H, furnished with teethmeshing into cogs O, formed on the trunnion-plates E, and actuated bythe power applied to bar H or to one rocking grate of the set.

In Fig. 2 is shown a handle, I, (which may be passed either through orbelow the pivot 0,) attached to an arm or projection, J, on one or moreof the rocking grates. By reciprocating this handle I, the grate towhich it is connected has a rocking motion imparted to it, and the othergrates,.B B, are rocked simultaneously through the agency of the bar H.

The arrangement of the rocking grates and vformed upon their surface;and the object of our improvement is to construct `a grate that 4willbreak' and grind up the clinkers, as well as to dislodge them from theconvex surface of the grate. Y

To effect this object we arrange the ribs G,

l which form the principal surface of the grate, at

an angle or curve with the side bars D, so that the clinkers lying uponthe grate and necessarily penetrating the spaces c between the ribs Gr)will be forced lengthwise of the grate as it is rocked upon itstrunnions, and, being forced by the rocking motion into contact with thecoal on the adjoining grate at the same time, it will be effectuallybroken up and ultimately fall into the spurs F, which will reduce itstill further, and discharge it below the grate.

In Fig. 3 are shown three grates, in which the ribs are simply inclinedto the side bars of the grate D D, while the tops are arched, as shownin Fig. 2.

It will be evident that when the grates are rocked, the adjoining spurs,as at e e, Fig. 2, will be moved in opposite directions, as indicated bythe arrows cl d.

At el d, in Fig. 3, the arrows also show that the clinkers would bepushed in opposite directions, thus exposing them to a variety offorces, which insure their speedy reduction.

In Fig. 1 the ribs Gr are shown, both spirally and curved, in a topview, eith erI of which arrangements is greatly preferable to the usualtransverse arrangement of the rocking surfaces, as tending to pushclinkers along on the grate and break them into fragments, as well as todislodge them. l

It will be `noticed that the spurs F are not mere guards or lugs toregulate the space between adjoining grates, that being fully determinedby the position of the trunnions a a in the frame A A, but are providedat frequent intervals, to catch and break up the loosened fragments ofclinkers.

It Will also be seen that the rocking grate shown in Fig. 1 can bereadily substituted for any dumping-grate novT in use in ranges andcooking-stoves, the external frame A and piv ots C C being carefullymade to correspond with the present pattern. By such a substitution of arocking and dumping grate for the ordinary stove-grate, much greatereconomy can be securedin the consumption of the coal, as it can be rakedby rocking the grates from time to time, and the heat thus be alwaysobtained from a clear ire.

It is evident, also, that our rocking grates can be tted into a framesuitable for portable furnaces and heaters noW using a shaking anddumping grate, thus greatly diminishing the labor required to keep thef1re clean, as the rocking grate is operated, When cleaning the fire,With one-half the labor required by a shaking-grate. In this case the,frame A A may require to be of a round or curved form, and the rockinggrates may be preferably operated by other means than the bar H and cogse, as, by connecting the handle I to a projection, J, on each rockinggrate B, or moving the bar H by a lever or other connection to thehandle I, thepassing of handle I through the pivot C permitting theframe A A to be rotated Whenever the contents are to be dumped.

We are aware that single grate-bars have been constructed to rock, andto drop or tip down at one end to discharge their contents, and Wecannot, therefore, claim such'a construction; but having secured in ourarrangement the ease of cleaning the re afforded by rockin g thecoal-bearing grates, and facility in dumping by supporting them in apivoted frame, and convenience in raking or rocking the same by ahandle, I, passed through the pivot C of the rotating frame A A,

We claim and desire to secure by Letters Patentl. The frame A A,arranged to rotate ou pivots C C', and containing rocking gratesB B,operated by connections to handle I passing through pivot C, the Wholeconstituting a rocking and dumping grate for furnaces.

2. The rocking grate B, constructed With side bars D D, trunnion-platesE, trunnions a a, andribs G, inclined at an angle to the side bars D,for moving clinkers longitudinally on the grate, in the manner and forthe purpose described.

H. H. BURRITT. GEORGE A. OHL. Witnesses:

C. C. HERRIGK, GEO. H. BoDENsoHATz.

